观察下面句子的画线部分，试着说明它们的特点和在句中的作用。

1．However, people thought me simple-minded until they discovered I had“artificial intelligence”．

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2．Then I was the size of a large room!

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3．As the years have gone by, I've been made smaller and smaller．

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4．I love being used to connect people who aren't close enough to speak to each other．

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5．I'm as big as a human．In fact, I look like one, too．

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